feat(vocab): add dashboard learning summary and related endpoints

- Introduced `getDashboardLearningSummary` method in `VocabService` to provide a compact overview of enrolled courses and current lessons for users.
- Updated `vocabController` to include a new route for the dashboard widget, allowing users to access their learning summary.
- Enhanced `vocabRouter` to route requests for the new dashboard widget endpoint.
- Added localization support for the new dashboard features across multiple languages, improving user engagement and accessibility.
- Updated UI components to integrate the new dashboard widget, ensuring a seamless user experience.

backend/models/falukant/data/user.js

@@ -36,6 +36,11 @@ FalukantUser.init({
     lastNobilityAdvanceAt: {
         type: DataTypes.DATE,
         allowNull: true
+    },
+    lastPoliticalDailySalaryOn: {
+        type: DataTypes.DATEONLY,
+        allowNull: true,
+        field: 'last_political_daily_salary_on'
     }
 }, {
     sequelize,